... My SP10s were case in point of this fact and the
difficulty increase, hardware delay is only going to get worse in the future. ...
I don't think your claim is true. You did ship the miner to the US after it was sent to Japan (I'm not revealing customer info here, you posted pictures of the SP10 box in the metro), so it did took some time, but I do think you've met or about to meet ROI.
You were a very happy customer until the SP30 spec update. You got your money back. Indeed, you had to find someone to trade with.
I don't intend to continue arguing, so you don't need to reply.
Guy
Edit:
https://bitcointalk.org/index.php?topic=704251.msg7962548#msg7962548